diff options
| -rw-r--r-- | drivers/nfc/nfcwilink.c | 288 |
1 files changed, 284 insertions, 4 deletions
diff --git a/drivers/nfc/nfcwilink.c b/drivers/nfc/nfcwilink.c index ee60d084433..90af28d611f 100644 --- a/drivers/nfc/nfcwilink.c +++ b/drivers/nfc/nfcwilink.c @@ -29,6 +29,7 @@ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/types.h> +#include <linux/firmware.h> #include <linux/nfc.h> #include <net/nfc/nci.h> #include <net/nfc/nci_core.h> @@ -41,6 +42,17 @@ #define NFCWILINK_OFFSET_LEN_IN_HDR 1 #define NFCWILINK_LEN_SIZE 2 #define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */ +#define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */ + +#define BTS_FILE_NAME_MAX_SIZE 40 +#define BTS_FILE_HDR_MAGIC 0x42535442 +#define BTS_FILE_CMD_MAX_LEN 0xff +#define BTS_FILE_ACTION_TYPE_SEND_CMD 1 + +#define NCI_VS_NFCC_INFO_CMD_GID 0x2f +#define NCI_VS_NFCC_INFO_CMD_OID 0x12 +#define NCI_VS_NFCC_INFO_RSP_GID 0x4f +#define NCI_VS_NFCC_INFO_RSP_OID 0x12 struct nfcwilink_hdr { __u8 chnl; @@ -48,6 +60,36 @@ struct nfcwilink_hdr { __le16 len; } __packed; +struct nci_vs_nfcc_info_cmd { + __u8 gid; + __u8 oid; + __u8 plen; +} __packed; + +struct nci_vs_nfcc_info_rsp { + __u8 gid; + __u8 oid; + __u8 plen; + __u8 status; + __u8 hw_id; + __u8 sw_ver_x; + __u8 sw_ver_z; + __u8 patch_id; +} __packed; + +struct bts_file_hdr { + __le32 magic; + __le32 ver; + __u8 rfu[24]; + __u8 actions[0]; +} __packed; + +struct bts_file_action { + __le16 type; + __le16 len; + __u8 data[0]; +} __packed; + struct nfcwilink { struct platform_device *pdev; struct nci_dev *ndev; @@ -55,14 +97,241 @@ struct nfcwilink { char st_register_cb_status; long (*st_write) (struct sk_buff *); - struct completion st_register_completed; + + struct completion completed; + + struct nci_vs_nfcc_info_rsp nfcc_info; }; /* NFCWILINK driver flags */ enum { NFCWILINK_RUNNING, + NFCWILINK_FW_DOWNLOAD, }; +static int nfcwilink_send(struct sk_buff *skb); + +static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how) +{ + struct sk_buff *skb; + + skb = alloc_skb(len + NFCWILINK_HDR_LEN, how); + if (skb) + skb_reserve(skb, NFCWILINK_HDR_LEN); + + return skb; +} + +static void nfcwilink_fw_download_receive(struct nfcwilink *drv, + struct sk_buff *skb) +{ + struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data; + + /* Detect NCI_VS_NFCC_INFO_RSP and store the result */ + if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) && + (rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) { + memcpy(&drv->nfcc_info, rsp, + sizeof(struct nci_vs_nfcc_info_rsp)); + } + + kfree_skb(skb); + + complete(&drv->completed); +} + +static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name) +{ + struct nci_vs_nfcc_info_cmd *cmd; + struct sk_buff *skb; + unsigned long comp_ret; + int rc; + + nfc_dev_dbg(&drv->pdev->dev, "get_bts_file_name entry"); + + skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd), + GFP_KERNEL); + if (!skb) { + nfc_dev_err(&drv->pdev->dev, + "no memory for nci_vs_nfcc_info_cmd"); + return -ENOMEM; + } + + skb->dev = (void *)drv->ndev; + + cmd = (struct nci_vs_nfcc_info_cmd *) + skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd)); + cmd->gid = NCI_VS_NFCC_INFO_CMD_GID; + cmd->oid = NCI_VS_NFCC_INFO_CMD_OID; + cmd->plen = 0; + + drv->nfcc_info.plen = 0; + + rc = nfcwilink_send(skb); + if (rc) + return rc; + + comp_ret = wait_for_completion_timeout(&drv->completed, + msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); + nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", + comp_ret); + if (comp_ret == 0) { + nfc_dev_err(&drv->pdev->dev, + "timeout on wait_for_completion_timeout"); + return -ETIMEDOUT; + } + + nfc_dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d", + drv->nfcc_info.plen, + drv->nfcc_info.status); + + if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) { + nfc_dev_err(&drv->pdev->dev, + "invalid nci_vs_nfcc_info_rsp"); + return -EINVAL; + } + + snprintf(file_name, BTS_FILE_NAME_MAX_SIZE, + "TINfcInit_%d.%d.%d.%d.bts", + drv->nfcc_info.hw_id, + drv->nfcc_info.sw_ver_x, + drv->nfcc_info.sw_ver_z, + drv->nfcc_info.patch_id); + + nfc_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", file_name); + + return 0; +} + +static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len) +{ + struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data; + struct sk_buff *skb; + unsigned long comp_ret; + int rc; + + nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry"); + + /* verify valid cmd for the NFC channel */ + if ((len <= sizeof(struct nfcwilink_hdr)) || + (len > BTS_FILE_CMD_MAX_LEN) || + (hdr->chnl != NFCWILINK_CHNL) || + (hdr->opcode != NFCWILINK_OPCODE)) { + nfc_dev_err(&drv->pdev->dev, + "ignoring invalid bts cmd, len %d, chnl %d, opcode %d", + len, hdr->chnl, hdr->opcode); + return 0; + } + + /* remove the ST header */ + len -= sizeof(struct nfcwilink_hdr); + data += sizeof(struct nfcwilink_hdr); + + skb = nfcwilink_skb_alloc(len, GFP_KERNEL); + if (!skb) { + nfc_dev_err(&drv->pdev->dev, "no memory for bts cmd"); + return -ENOMEM; + } + + skb->dev = (void *)drv->ndev; + + memcpy(skb_put(skb, len), data, len); + + rc = nfcwilink_send(skb); + if (rc) + return rc; + + comp_ret = wait_for_completion_timeout(&drv->completed, + msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); + nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", + comp_ret); + if (comp_ret == 0) { + nfc_dev_err(&drv->pdev->dev, + "timeout on wait_for_completion_timeout"); + return -ETIMEDOUT; + } + + return 0; +} + +static int nfcwilink_download_fw(struct nfcwilink *drv) +{ + unsigned char file_name[BTS_FILE_NAME_MAX_SIZE]; + const struct firmware *fw; + __u16 action_type, action_len; + __u8 *ptr; + int len, rc; + + nfc_dev_dbg(&drv->pdev->dev, "download_fw entry"); + + set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); + + rc = nfcwilink_get_bts_file_name(drv, file_name); + if (rc) + goto exit; + + rc = request_firmware(&fw, file_name, &drv->pdev->dev); + if (rc) { + nfc_dev_err(&drv->pdev->dev, "request_firmware failed %d", rc); + + /* if the file is not found, don't exit with failure */ + if (rc == -ENOENT) + rc = 0; + + goto exit; + } + + len = fw->size; + ptr = (__u8 *)fw->data; + + if ((len == 0) || (ptr == NULL)) { + nfc_dev_dbg(&drv->pdev->dev, + "request_firmware returned size %d", len); + goto release_fw; + } + + if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) != + BTS_FILE_HDR_MAGIC) { + nfc_dev_err(&drv->pdev->dev, "wrong bts magic number"); + rc = -EINVAL; + goto release_fw; + } + + /* remove the BTS header */ + len -= sizeof(struct bts_file_hdr); + ptr += sizeof(struct bts_file_hdr); + + while (len > 0) { + action_type = + __le16_to_cpu(((struct bts_file_action *)ptr)->type); + action_len = + __le16_to_cpu(((struct bts_file_action *)ptr)->len); + + nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d", + action_type, action_len); + + switch (action_type) { + case BTS_FILE_ACTION_TYPE_SEND_CMD: + rc = nfcwilink_send_bts_cmd(drv, + ((struct bts_file_action *)ptr)->data, + action_len); + if (rc) + goto release_fw; + break; + } + + /* advance to the next action */ + len -= (sizeof(struct bts_file_action) + action_len); + ptr += (sizeof(struct bts_file_action) + action_len); + } + +release_fw: + release_firmware(fw); + +exit: + clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); + return rc; +} + /* Called by ST when registration is complete */ static void nfcwilink_register_complete(void *priv_data, char data) { @@ -74,7 +343,7 @@ static void nfcwilink_register_complete(void *priv_data, char data) drv->st_register_cb_status = data; /* complete the wait in nfc_st_open() */ - complete(&drv->st_register_completed); + complete(&drv->completed); } /* Called by ST when receive data is available */ @@ -97,6 +366,11 @@ static long nfcwilink_receive(void *priv_data, struct sk_buff *skb) (apart for the chnl byte, which is not received in the hdr) */ skb_pull(skb, (NFCWILINK_HDR_LEN-1)); + if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) { + nfcwilink_fw_download_receive(drv, skb); + return 0; + } + skb->dev = (void *) drv->ndev; /* Forward skb to NCI core layer */ @@ -137,14 +411,14 @@ static int nfcwilink_open(struct nci_dev *ndev) nfcwilink_proto.priv_data = drv; - init_completion(&drv->st_register_completed); + init_completion(&drv->completed); drv->st_register_cb_status = -EINPROGRESS; rc = st_register(&nfcwilink_proto); if (rc < 0) { if (rc == -EINPROGRESS) { comp_ret = wait_for_completion_timeout( - &drv->st_register_completed, + &drv->completed, msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT)); nfc_dev_dbg(&drv->pdev->dev, @@ -172,6 +446,12 @@ static int nfcwilink_open(struct nci_dev *ndev) BUG_ON(nfcwilink_proto.write == NULL); drv->st_write = nfcwilink_proto.write; + if (nfcwilink_download_fw(drv)) { + nfc_dev_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d", + rc); + /* open should succeed, even if the FW download failed */ + } + goto exit; clear_exit: |